EP0644567A1 - Gasisolierter Hochspannungsschalter mit rotierendem Lichtbogen - Google Patents

Gasisolierter Hochspannungsschalter mit rotierendem Lichtbogen Download PDF

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Publication number
EP0644567A1
EP0644567A1 EP94410076A EP94410076A EP0644567A1 EP 0644567 A1 EP0644567 A1 EP 0644567A1 EP 94410076 A EP94410076 A EP 94410076A EP 94410076 A EP94410076 A EP 94410076A EP 0644567 A1 EP0644567 A1 EP 0644567A1
Authority
EP
European Patent Office
Prior art keywords
rings
switch according
gas
movable contact
fixed
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP94410076A
Other languages
English (en)
French (fr)
Other versions
EP0644567B1 (de
Inventor
Michel Barrault
Georges Bernard
Jean-Claude Faye
Paul Glenat
Pierre Leclercq
Joseph Maffoul
Stephen Rowe
Denis Raphard
Raymond Soboul
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Schneider Electric Industries SAS
Original Assignee
Schneider Electric SE
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Schneider Electric SE filed Critical Schneider Electric SE
Publication of EP0644567A1 publication Critical patent/EP0644567A1/de
Application granted granted Critical
Publication of EP0644567B1 publication Critical patent/EP0644567B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
    • H01H33/08—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
    • H01H33/10—Metal parts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
    • H01H33/98—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being initiated by an auxiliary arc or a section of the arc, without any moving parts for producing or increasing the flow
    • H01H33/982—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being initiated by an auxiliary arc or a section of the arc, without any moving parts for producing or increasing the flow in which the pressure-generating arc is rotated by a magnetic field

Definitions

  • Document FR-A-2 371 762 describes a rotary arc switch comprising rings (8) which serve to cool the electric arc and to produce a gas rolling effect.
  • These rings each have the shape of a flat washer whose inner diameter or diameter of the central hole is slightly greater than an outer diameter of a flared part of the movable contact (11), so that the gas produced in the cut is forced to pass longitudinally in the space between the outer diameter of the movable contact and the inner diameter of the central hole of each ring (8), hence a gas rolling effect.
  • the electric arc substantially follows the inner edge of the rings and it follows that the rings are used for cooling the arc but that the ionized gas produced is not sufficiently cooled. The breaking capacity of such a circuit breaker is limited.
  • the document EP-A-0 064 425 describes a rotary arc switch in which, inside an arc extinguishing chamber, is provided a wall (44) which is in the form of a cylindrical socket and which is concentrically housed in the arc extinguishing chamber which has a substantially annular shape, this wall (44) having the function of guiding the gas flow so as to make it undergo a circulatory movement inside the chamber arc extinction in order to improve the arc extinction function obtained by this gas circulation.
  • This wall (44) is formed by a single piece, and it therefore has only two opposite cylindrical surfaces in contact with the gas, these opposite surfaces being located substantially along the longitudinal central axis of the switch and not offering a contact area with the gas large enough to cause significant cooling of this gas.
  • post-arc currents In addition, in known switches of the types corresponding to the documents of the prior art cited above, there generally occurs a phenomenon of the appearance of "post-arc currents". This well-known phenomenon occurs when the conventional switch operates so as to cut off a current whose intensity is close to the maximum admissible current for this switch, for example, for a high voltage installation, a maximum admissible current equal to 30 kA.
  • post-arc currents are electrical currents which can last several tens of milliseconds after the opening of the electrical contacts, without these currents causing failure to cut. These currents are then called “post-recovery currents".
  • An object of the present invention is to provide a high voltage switch with a rotating arc enabling an increased breaking capacity to be obtained without increasing the dimensions of the switch.
  • Another object of the present invention consists in proposing such a switch which can also maintain its improved performance while reducing the dimensions of the switch.
  • Another object of the present invention is to provide such a switch which further makes it possible to prevent the occurrence of "post-recovery currents" when the switch operates so as to cut off an electric current whose intensity is close to the maximum value. admissible for this switch.
  • the switch according to the invention is characterized in that fixing means secure the cooling means to a rigid part of the switch, that each of said rings is in the general form of a substantially flat and thin plate in shape disc provided with a central hole whose diameter is greater than the largest external diameter of the movable contact, that the rings are arranged so as to surround the movable contact while being substantially centered on the longitudinal central axis of said switch, and that the maximum distance between the fixed and movable contacts is equal to or less than the sum of the minimum distance between said cooling means and the fixed contact and the minimum distance between said cooling means and the fully open movable contact.
  • FIG. 1 a distinction is made between the essential parts constituting a high voltage rotary arc switch 1 which can be used, for example, in high voltage circuit breakers.
  • This switch 1 is designed to include certain improvements, which will be described later, which make it possible to give the switch a breaking capacity greater than 30 kA, this while reducing the dimensions of the switch.
  • Such a switch can for example be easily designed so as to be able to carry out current cuts of the order of 40 to 50 kA, without inducing post-arc current.
  • the switch 1 is isolated by an insulating gas with high dielectric strength, in particular sulfur hexafluoride and comprises a fixed contact 2, a movable contact 3, a sealed casing 4 which forms inside an interrupting chamber 5 surrounding the fixed 2 and mobile 3 contacts, as well as a device 6 for rotating the electric arc.
  • the arc rotation device 6 comprises a fixed annular electrode arranged around the fixed contact 2 and which is connected to the latter by a coil 7.
  • the movable contact 3 is shown in its closed position of the switch in the upper part of the figure and in its open position of the switch in the lower part of the figure.
  • the movable contact 3 is in the general form of a hollow tube 8 which is centered on the longitudinal central axis 9 of the switch 1.
  • the movable contact 3 moves back and forth along this central axis longitudinal 9.
  • the fixed contact 2 is in the general form of a ring and the movable contact 3 is also in the general form of a ring of substantially identical diameter.
  • a set of connection pieces 10, 11, 12 connects fixedly and tightly the fixed contact 2 and the movable contact 3 to the waterproof casing 4.
  • the fixed contact 2 is connected to a terminal or to an external electrical connection piece 13 and the movable contact 3 is integral with a mechanical actuating device (not shown) making it possible to control its longitudinal reciprocating movement, and is electrically connected to a terminal or an electrical connection piece (not shown) .
  • the parts 10, 11, 12, 13 as well as the other parts mentioned above and not shown in FIG. 1 can be of a conventional design very well known for such a high voltage rotary arc switch 1, and these parts are therefore not not described in more detail here.
  • An object of the present invention is to provide inside the interrupting chamber 5 a gas cooling device 14 which has several functions but the essential function of which is to cause rapid cooling of the interrupted gases heated during the formation of the electric arc.
  • the gas cooling device 14 is in the form of a rigid assembly having an annular part fixed inside the interrupting chamber 5 in a manner centered on the longitudinal central axis 9 of the switch 1.
  • the sealed envelope 4 has a cylindrical shape such that the interrupting chamber 5 delimited towards the outside by the internal wall of the waterproof envelope 4 and towards the inside by the external wall of the support tube 8 of the movable contact 3, is a chamber having an annular shape.
  • the gas cooling device 14 consists of a plurality of rings 15, each ring 15 being in the form of a substantially flat washer, that is to say that each ring 15 has a circular external rim 16 and a central hole limited by an internal rim 17.
  • the rings 15 are preferably arranged parallel to one another and are spaced from each other by a constant or variable distance, so that the rings 15 constitute between them a plurality of annular passages 18 which extend substantially radially with respect to the longitudinal central axis 9 of the switch 1.
  • the rings 15 can be held in place in the position described above using support pieces 19 which allow the rings 15 to be connected to a rigid piece 11 of the switch 1.
  • FIG. 1 there is shown only one of these support parts 19, which comprises a threaded rod whose left end is anchored on the connecting piece 11 and which s extends substantially longitudinally inside the cutting chamber 5.
  • the rings 15 have holes made in correspondence with the support pieces 19 and the rings 15 are arranged in a stacked fashion on the support pieces 19 which pass through the holes of the rings 15.
  • Spacers 20 are arranged between each adjacent ring 15 so as to ensure the spacing of the rings 15 with each other, this spacing making it possible to constitute the different e annular spaces 18 described above.
  • the operation of the gas cooling device 14 is as follows:
  • the gas cooling device 14 has a central hole having a diameter larger than the outer diameter of the movable contact 3.
  • the ring 15A which is located closest to the movable contact 2 is disposed at a relatively small longitudinal distance from the fixed contact 2 and the distance between its internal rim 17 and the external rim of the fixed contact 2 is indicated in Figure 1 by the reference D1.
  • the ring 15B located opposite to the ring 15A is located either substantially in line with the movable contact 3 when the latter is in the open position, or further back with respect to the movable contact 3 when the latter ci is in the open position, as shown in the lower part of Figure 1.
  • one of the rings 15 located in an intermediate position between the end rings 15A and 15B constitutes the ring whose internal rim 17 is located closest to the external rim of the movable contact 3 in the open position and the distance which thus separates this internal rim 17 and the external rim of the contact movable 3 defines a distance D2 which is shown in FIG. 1.
  • the distance which separates the movable contact 3 from the fixed contact 2 is a distance C.
  • the arrangement of the re device cooling of the gases 14 in the breaking chamber 15 is chosen so that the sum of the distances D1 and D2 is substantially equal to or greater than the distance C.
  • FIG. 2 shows an alternative embodiment of the gas cooling device 14 according to the present invention.
  • the rings 15 are thicker, are smaller in number, for example three, but are made of a metallic material permeable to gas, for example a porous metallic material or a metallic material constituted by agglomerated balls or by sintered particles.
  • a metallic material permeable to gas for example a porous metallic material or a metallic material constituted by agglomerated balls or by sintered particles.
  • FIG. 3 shows another variant of the gas cooling device 14.
  • a cylindrical annular part 20 which is spaced from the outer edges 16 of the rings 15 and which is produced made of a porous metallic material.
  • FIG 4 shows yet another alternative embodiment of the gas cooling device 14 according to the present invention.
  • the rings 15 have a general shape of a flat plate, as before, but also have similar undulations for each ring, which means that, when the rings are stacked, the annular space 18 located between each adjacent ring is a space which constitutes a non-rectilinear path but a zigzag path due to the fact that this space constitutes baffles. This causes some turbulence in the gas passing through the annular spaces 18, which further increases the heat exchange between the gas and the rings 15 in order to cool the gas even more effectively.
  • the stack of metal sheets or rings 15 of the gas cooling device 14 is fixed directly to the front part 30 of the coil 7 by means of bolts 32 (one of which is visible on the figure 5).
  • the coil 7 is formed by a succession of turns 34 connected in series, and assembled one against the other by means of screws 36, which extend parallel to the bolts 32.
  • the upper turn 34 of the coil 7 is in contact with a current supply range 37 connected to the upper terminal 38 of the circuit breaker.
  • the sheets 15 of the gas cooling device are electrically isolated from the coil 7 by means of isolation comprising in particular an insulating bush 40 traversed by each bolt 32. According to a variant devoid of means insulation, the sheets 15 of the cooling device are at the potential of the coil.
  • the invention is not limited to the embodiments which have just been described by way of nonlimiting example.
  • provision can be made for the rings 15 to be made of a metallic material but also of an insulating material.
  • slots 30 can be provided in these rings in order to avoid or limit the appearance of eddy currents which can be induced in the rings 15 by the presence of the coil 7 of the device for rotating the arc 6.

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Circuit Breakers (AREA)
  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
EP19940410076 1993-09-20 1994-09-15 Gasisolierter Hochspannungsschalter mit rotierendem Lichtbogen Expired - Lifetime EP0644567B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9311255A FR2710452B1 (fr) 1993-09-20 1993-09-20 Interrupteur haute tension à arc tournant.
FR9311255 1993-09-20

Publications (2)

Publication Number Publication Date
EP0644567A1 true EP0644567A1 (de) 1995-03-22
EP0644567B1 EP0644567B1 (de) 1999-07-28

Family

ID=9451094

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19940410076 Expired - Lifetime EP0644567B1 (de) 1993-09-20 1994-09-15 Gasisolierter Hochspannungsschalter mit rotierendem Lichtbogen

Country Status (4)

Country Link
EP (1) EP0644567B1 (de)
DE (1) DE69419681T2 (de)
ES (1) ES2136182T3 (de)
FR (1) FR2710452B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0768692A1 (de) * 1995-10-16 1997-04-16 Schneider Electric Sa Autoexpansionsschalter mit Isoliergas

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100536054C (zh) * 2007-06-08 2009-09-02 华中科技大学 旋转电弧脉冲功率开关
DE102014101687A1 (de) * 2014-02-11 2015-08-13 Eaton Electrical Ip Gmbh & Co. Kg Schaltgerät zum polaritätsunabhängigen Schalten von Gleichstrom

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1014637A (fr) * 1949-03-15 1952-08-19 Hazemeijer Co Interrupteur à courant alternatif, particulièrement pour forters intensités
BE536558A (de) * 1954-03-16 1955-04-15
FR1100959A (fr) * 1954-03-10 1955-09-27 Gardy Particip App Procédé et dispositif de coupure d'arc électrique et leurs applications
DE1963216A1 (de) * 1968-12-23 1970-07-09 Gen Electric Luftschalter mit nachfolgend angeordneter Lichtbogenloeschkammer
FR2371762A1 (fr) * 1976-11-18 1978-06-16 Cem Comp Electro Mec Appareil electrique de coupure a haute tension, notamment un disjonct a auto-soufflage de l'arc electrique de coupure par un gaz
EP0022708A1 (de) * 1979-07-12 1981-01-21 Merlin Gerin Lichtbogenlöschkammer für mehrpoligen Niederspannungs-Leistungsschalter mit gegossenem Gehäuse
EP0064425A2 (de) * 1981-04-20 1982-11-10 Merlin Gerin Schalter mit in einem Isoliergas rotierenden Lichtbogen
FR2542918A1 (fr) * 1983-03-15 1984-09-21 Merlin Gerin Interrupteur a arc tournant a circulation des gaz ionises

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1014637A (fr) * 1949-03-15 1952-08-19 Hazemeijer Co Interrupteur à courant alternatif, particulièrement pour forters intensités
FR1100959A (fr) * 1954-03-10 1955-09-27 Gardy Particip App Procédé et dispositif de coupure d'arc électrique et leurs applications
BE536558A (de) * 1954-03-16 1955-04-15
DE1963216A1 (de) * 1968-12-23 1970-07-09 Gen Electric Luftschalter mit nachfolgend angeordneter Lichtbogenloeschkammer
FR2371762A1 (fr) * 1976-11-18 1978-06-16 Cem Comp Electro Mec Appareil electrique de coupure a haute tension, notamment un disjonct a auto-soufflage de l'arc electrique de coupure par un gaz
EP0022708A1 (de) * 1979-07-12 1981-01-21 Merlin Gerin Lichtbogenlöschkammer für mehrpoligen Niederspannungs-Leistungsschalter mit gegossenem Gehäuse
EP0064425A2 (de) * 1981-04-20 1982-11-10 Merlin Gerin Schalter mit in einem Isoliergas rotierenden Lichtbogen
FR2542918A1 (fr) * 1983-03-15 1984-09-21 Merlin Gerin Interrupteur a arc tournant a circulation des gaz ionises

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0768692A1 (de) * 1995-10-16 1997-04-16 Schneider Electric Sa Autoexpansionsschalter mit Isoliergas
FR2739972A1 (fr) * 1995-10-16 1997-04-18 Schneider Electric Sa Disjoncteur electrique a gaz isolant et a autoexpansion
CN1074577C (zh) * 1995-10-16 2001-11-07 施耐德电器工业公司 气体绝缘和自灭弧膨胀式电路断路器

Also Published As

Publication number Publication date
ES2136182T3 (es) 1999-11-16
FR2710452A1 (fr) 1995-03-31
DE69419681D1 (de) 1999-09-02
DE69419681T2 (de) 2000-04-06
FR2710452B1 (fr) 1995-11-24
EP0644567B1 (de) 1999-07-28

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